Flue or tube expander.



Patented June 8, 1909.

WW) m fi s rrrrns FLUE OR TUBE EXPANDER.

Specification of Letters Patent.

Patented June 190%).

Application hie-.1 December 17, 1908'. Sell-Til No. 465.015.

To all vi /11ml (It may; ronwrn:

Be it known that .l, Jonx n. iflxnssmn, :L citizen of the United Stiles,and resident of Mobrrly, .dissouri, have llHi-H'l'tiil certain new anduseful lniprovommits in Fine or Tube llxpnnders, of which the followingis :i,

pending tool, the object of my invention being to construct it simpletool to be used in connectionwith a pneunmtic hammer or the like forexpanding the ends of boiler lines or tubes in a boiler sheetor heed,and which tool is so constructcd thet the segmental members of the bodyofthe tool are held together in proper position while the tool is inuse, and the mandrel olthe tool being so con- 1 structed as to maintainits proper position within the body of the tool whilethe same i is inuse.

To the above purposes my inventhmcom sists in certain novel features ofconstructlon til-hell on the line 22 oi Fig. 1; Fig. 3 is it perspectiveView of one of the segmental l l I the members 1 members forn'iing theoxpandingbody of;

the tool. i

Referring by numerals to the ziccompaliying drawings, the-body of theexpander is lllittlfi up ofn series of segmental inembei's 1, which arein the form of elongated. blocks of hardened metal, the outer fiicesofwhich are sligl'itly curved in cross section in order that the body maybe formed perfectly round when the segmental members 1 are asscmbled.Formed on each member 1,, "a short distance from the outer end thereof,is it lug 2, and the lugs onell of the members combine to form a rib,which, when the tool is in use, engages the boiler flue or tube imllletllttUf-lY adjacent the inside of the sheet or boiler head. I"

l wmcd on the outer surface of each memher i, short distance to the rearof the log 2, is it shoulder 3, and the shoulders on all of the members1 engage egsinst the end of the toward the l'orwe boiler tube oi ilueand cxpoml the some nirninst the oulci'lnceof the sheet or boiler heardwhen the tool is inusc. Formed in the outerfacc of each member 1.adjacent the rum end thereof, is notch 4, and the notches of rill ofthennn'nl'iers lorn'i ii groove odjitccnt the rear end of the body ofthe tool in which groove is seated :1 heavy tic ring 5 of rubber ordih'ilOQfOUS 1mitcriitl', although this ring may be in the lorni Theinner lares'fi ol the members l are perfectly list and are formed onsuch lon'gritudimil angles that the opening in thecenter ol the body ofthe tool tapers end, end tornied integral \viththe reai e'nds of theinenil'iers I are lugs 7, ii hich combiiie'to form at flange around thepening.in' the center of the body of the tool at the rear end thereof.

The mandrel used in (TOIH'IOCl'ilOll with my improved tool comprises asolid cylindrical shank 8, on which is adapted to be engaged the forwardend of a pneumatic hammer or like tool, in order that the plunger ofsaid tool Will'strike against the end of said shank 8, and formedintegrnl'with the forward end of this shank 8 is a smell cylindricalSlltlllk with which is formed integral a. head 10, on

the exterior of Wlnch 1s fornu d series of list beveled or inclinedbearing: faces 1], which, I

whenthe tool is assembled and in use, bear against the corresponding;faces 6 formed oil The rear end of the head 1.0 is cl such size as thatan abrupt shoulder 12 formed lielm' cen snid heard and the slnink 9,which shoulder bears against the inner faces of the lugs 7 when the toolis assembled, thus preventing the mandrel from becoming easilydisengaged from the body of the tool.

When an expander of my improved construction is in use, the forwardportion of the body, made upol the segmental members 1.; is inserted inthe end of a boiler flue or tube, as shown in Fig. 1, Mill when themandrel 8 is'forribly struck with the plui'iger of :1V pneumatichan'iiner or like tool, the lieudlO oi" s'sidmandrel will be forcedl'im'vard, and as a, result all of the segmental *n'iei'i'ibers 1 willbe uniformly moved outward, which resultsin an expsir-ding action on theend of the tube or this, and as this operation is continued the 'flue ortul efi's ploperly expanded and set in thesheet or boiler head. y

The ring 5 tendsto drew the members 1 together and during the use of thetool main- 'tain's said members in their proper positions.

iii?

moving rearward as the segmental sections.

are drawn to ether b the action of the rim m r I I 4 2w .5. lhe rearwardmovement ol: the mandrel limited b the en a ement of the shoulder 12against the lugs 7, and this construction. prevents the mandrel h'oinbecoming disen gagged or separated from the body of the expander.

An expanding tool of my improved eonstrnction is veryshnple, strong anddurable, be operated by either ahand or a pneumatic hammer, and themandrel is at all times held in proper position within the body or thetool.

I claiin 1. A tube expander, comprising a body made up of a series ofsegmental members, elastic means encircling the rear portion of the bodyfor holding the segmental members together, the inner faces ofthesegmental members being flat and inclined so as to form a taperedopening through the body, a. mandrel, one end of which novided with a series of fiat beveled bearing adapted to engage the corresponding; faceson the mental member... 01' the body, and means formed integral with therear ends of the segmental inel'nbers for engaging the mandrel andholding the same against withdra 'al from the body.

2. In a flue expander, the combination With a so less of segmentalmembers radially arranged to form a cylindrical body, elastic meansencircling the rear portion of the body for holding the segmentalmembers together, there being inclined faces formed. on the inner facesof the segmental members so as to form a rta ered aperture through thebody, inword y projecting lugs formed integral with the rear ends ol.the segmental members, of a mandrel, and a tapered head formed integralwith one end of said mandrel, which tapered head is provided with flatbearing faces cor responding to the feces formed on the mental members,and tl re being a shoulder fe-rrned between the ta'oored head nd thewith one end of the manl'irel, which tapered head fits the taperel'lopening through the cylindrical. body, and the base of said tapered headbeing engaged by the logs on the segmental members.

4. A tube expander, comprising a body made up of aseries of segmentalmembers. elastic means encircling the body for holding; the memberstogether, there being; a leper-ed opening through the longitudinalcenlcl ol' the body, a tapered mandrel sealed in the tapered. opening,and means carried by rho rear ends of the segmental members i or eogn gi11,: a portion of the mandrel and holding the same against romwvardrillnlrmral from the body.

5. A line expander, com n'ising 1!. body made up of a series or"scgnncntal members, elastic means encircling the body l'or holding thesegmental members together, there being a tapered opening through ll clongitudinal center of the body, inwardly proiecling lugs integral withthe rear ends ol the segmental members, a mandrel, a tapered headintegral with the forward end of the mandrel, there being a shoulderFormed between the base of the bead. and the body of the mandrel againstwhich shoulder the inwardly pl-ojorting lugs engage to prevent therearward \rithdrziwal of the mandrel from the body or" the expander.

In testimony whereof, 1 home signed my name to this s 'leci'lieation, inpresence of two subscriliiing Witnesses.

JOHN W. FAFJShLER.

Witnesses M. P. SMITH, E. L. WALLAon.

